How do I export an object from blender and import in Maya?
The easiest way would be to select the object (desk) you want to export in Blender and export it as .obj file one of these ways:


click File -> Export -> Wavefront (.obj) OR
press space and type "export" -> click Export Scene: Export OBJ


Make sure to check Selection Only in the Export OBJ section, otherwise you would export the whole scene.

In Maya simply click 


File -> Import...


and select the exported file.